Minimum requirements for FD's in Ohio

My fire chief is a little thick headed (I think that's a requirement to be our chief) he heard somewhere a long time ago that there is a minimum number of members that a department must have on it's roster to be recognized by the state of Ohio. My question is, is this true and if so where can I find this in the laws? I ask because he can come up with some strange things and this seems like one of them. Our department needs to do some roster cleaning (don't ask). Anyway any input will help.
Stay Safe,
Lt. James Woda